If charge $+q$ is taken from one point to another over an equipotential surface, then

Prove that a closed equipotential surface with no charge within itself must enclose an equipotential volume.

$A$ charge is moved from point $A$ to points $B, C, D,$ and $E$ in the electric field of a charge $Q$ placed at the center of a circle. The work done will be:

The points having equal potentials are:

The figure shows three points $A, B$ and $C$ in a region of uniform electric field $E$. The line $A B$ is perpendicular and $B C$ is parallel to the field lines. Then,which of the following holds good? ($V_{A}, V_{B}$ and $V_{C}$ represent the electric potential at points $A, B$ and $C$,respectively)

Which of the following statements is not true?